Nate the Great wears a Sherlock Holmesian deerstalker’s cap and a trench coat worthy of Inspector Clouseau. And for decades the 9-year-old sleuth has been the hero of the first mysteries that many children read on their own, Marjorie Weinman Sharmat’s popular series of easy-readers for ages 5 through 8 that bears his name. Tomorrow on One-Minute Book Reviews: clues to his success in a review of the book that launched his adventures.